The Department of Defense (DoD), specifically the United States Air Force (USAF), is seeking innovative solutions through the Small Business Innovation Research (SBIR) program for the development of all-passive nonreciprocal power limiters. The objective is to design, fabricate, and characterize optical nonlinear metasurfaces that can function as asymmetric power limiters, providing protection for sensitive equipment from external interference in free space without the need for external biasing fields or signals. These devices are crucial for enhancing communication systems and ensuring the reliability of defense applications, with a focus on achieving a nonreciprocal response that offers significant isolation and low insertion loss. The solicitation is currently closed, with the release date on April 17, 2024, and the application due date set for June 12, 2024. For more information, interested parties can visit the official SBIR website at https://www.dodsbirsttr.mil/topics-app/.